The Accounting Records for Social Event Planning Services Include the Following

The accounting records for Social Event Planning Services include the following select unadjusted balances on December 31,2018: Salaries Expense,$6,000; Service Revenue: $18,000; Unearned Revenue,$400; Supplies Expense,$600; Rent Expense,$300; Depreciation Expense-Equipment,$200. During December,the company worked with a new client and provided event planning services for an upcoming event.It will receive the full amount of $1,500 when the event is completed in January 2019.As of the end of December 2018,it performed one-third of the services covered by the contract.The company made the accrual adjustments.The balance of Service Revenue,as shown on the adjusted trial balance,should be a ________.

A) debit balance of $19,500
B) credit balance of $18,000
C) debit balance of $1,500
D) credit balance of $18,500